Heat-diffuser for boiler-flues.



L. A. SMALLWOOD, DECD. A. SMALLWOOD, ADMINISTRATOR.

HEAT DIFFUSER FOR BOILER FLUES. APPLICATION rum) mm: 18, 1910.

1,082,829. I Patented Dec. 30, 1913.

2 SHEETS-SHEET 1.

L. A. SMALL-WOOD, DEGD. A. suALLwoon, ADMINISTRATOR. HEAT DIFFUSER FOR BOILER PLUES. APPLIOATION FILED JUNE 18, 1910.

' Patented Dec. 30, 1913.

2 SHEETS-SHEET} 2.

COLUMBIA PWOURAPH CO.,WA5HINUTON, D. C.

nnrrnp STATES PATENT eerie.

LEONARD A. s v u woon, or BIRMINGHAM, ENGLAND; ALFRED SMALLWOOD emvrrmsrneron or SAiD LEONARD A. slvrentwoob, nncnesrip. laner-nirrusnn FOR BOILER-FLUES.

1,082,829. Spe ifi ati n of L ter P n Patented Dec. 30, 1913.

Application filed June 18, 1910. Serial N 0. 567,640.

I In order that this invention may be clearly understood and practice, reference may be had to the apexplanatory sheets of drawings,

To all whom it may concern:

Be it known that I, LEONARD ALFRED F House, sworth, Birmingof Warwick, England,

Road, ham, in the county Figure 1 shows a longitudinal section of a tube manufacturer, have invented a certain oiler having a flue provided with the imnew and useful Heat-Diffuser for Boilerproved lining. *1g. 2 is an enlarged sec- Flues, of which the following is a speclficatlonal elevation of the improved lining with metal of the internal periphery of the flue. Figs. 3 and 4 are cross sectional elevations of the flue and lining shown in Figs. 1 and 2 respectively. Fig. 5 is a tion.

This invention relates to the furnaces of boilers of the Lancashire, Cornish, marine or other similar type and particularly to boilers in which the furnace gases issuing from the grate are directed in a b poses of evaporation. r

The object of the present improvements is to provide for the better utilization of the may be formed viding longitudinal channels a in the upper part of the bricks a such channels a being inalinement and forming gutters which extend the length of the arch A and which are by a suitable formation (Z of the front bricks D as shown in Fig. 6 or by a separate annulus 6 shown in Figs. 1 and 2. he channels or gutters may other b a of the bricks are suitably to provide a means of communication between the adjacent channels. y cutting apertures in the side webs a in this manner each brick may be left with four or six legs a which butt against the boiler plate B and thereby maintain the desired formation of the arch. In order to assist the radiation of heat from therefractory material A to the heating surface of the oiler, it may be desirable incorporated by a zone of extremely high heat inis generated and maintained in the be heated. he improvements are also such that the smoke is effectively consumed and reason of I carry out the present invention by building a lining of refractory material in close relation to the boiler plates in such a manner that while an inter-space or spaces is left between the refractory material and the boiler plate, air or furnace products is or are precluded from circulating in such space or spaces, which latter are thereby enabled to maintain a particularly high temperature and he same time to provide for the efiicient transmission of heat to the boiler plates for purposes of steam generation. The brickwork may conveniently take the form of an arch or lining commencing at or near the bridge and extending backwardly as far as may be required to obtain complete combustion. The space or spaces etween the lining andthe boiler plate are open at the rear, but closed at the front, and the refractory the brickwork; these strips becoming heated material more at the same time by reason of hannels or gutsurface of the boiler. no oxygen or furnace products more readily carried into plates tions and arranged to be out of contact with the flue. r

' 2. In combination with a boiler having a flue therein, of a refractory lining in said flue having reduced flue to support the lining therein, and metal heat conducting elements between the lining and said flue and out of contact with the flue, substantially as and for the purposes set forth.

3. In combination with a boiler having a flue therein,

flue having are enabled to circulate therein. Such metal strips may be arranged in all the channels or in any desired proportion thereof, in which latter case a depending rib 0 or ribs is furnished for their support.

It is obvious that a similar the refractory material may if desired be applied to the outer shell of the boiler, to be heated by the gases in their passage through the fines within the settings but in view of the reversed contour of the boiler additional security may be necessary the fire-bricks formation of reduced portions engaging the flue to support the lining therein, and metallic heat conducting means between the lining and said flue and out of contact with the flue, substantially as and for the purposes set forth.

for satisfactorily maintaining in place.

, What I claim as my invention and desire to secure by Letters Patent is 2- 1. In combination with a boiler having a flue therein, of a cylindrical lining disposed in said flue and composed of brickwork of In witness whereof-I havehereunto set refractory malteriail, said brickwork having my hand in the presence of two witnesses. re atively re uce ortions en a in the l flue and hollowed-out? portions to fo i'm an air SMALLWOOD' chamber between the refractory material and the flue, and metallic heat conducting elements disposed in said hollowed-out porlVitnesses:

ARTHUR H. BROWN, I-IoLLIs F. BROWN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0.

portions engaglng the of a refractory lining in said 

